Cylinder tube of toy gun

ABSTRACT

A cylinder tube of a toy gun is disclosed. A cylinder head is mounted on the cylinder tube of the toy gun. A tube passage is formed to penetrate through the cylinder head. Several air induction passages are formed circularly around the tube passage. A control device is applied to the air induction passages for opening or closing the air induction passages according to the forward or backward movement of the piston. As a result, much more air can be sucked into the air storage chamber immediately after the backward movement of the piston. Accordingly, the air capacity of the cylinder tube can be increased so as to produce larger air pressure for pushing the bullet to the outside of the toy gun, thereby improving the shooting performance of the toy gun and providing the simulated recoil effect, which simulates the real shooting.

FIELD OF THE INVENTION

The present invention relates to a cylinder tube of a toy gun, and more particularly to a toy gun with increased air suction area and air suction speed so as to produce larger air pressure for pushing the bullet away from the toy gun.

BACKGROUND OF THE INVENTION

The conventional toy gun includes a cylinder tube embedded securely in a gun body, wherein a rack is mounted on the bottom of the piston extending to the outside of the cylinder tube for driving the piston by a gear set. The gear set includes a driving gear, a steering gear and a final gear, wherein the final gear is a semi-gear with an incomplete gear ring, whereby the air can be compressed and exhausted by disengaging a releasing arc edge of the final gear from the rack after backward driving the rack and the piston by the final gear.

The air capacity of the cylinder tube is affected by the size of the gun body. Besides, the air suction ability of the cylinder tube is also affected by the size of the gun body. Due to the fast movement of the piston in the air suction process, the amount of air sucked into the cylinder tube via the tube passage of the cylinder head is insufficient. As a result, the shooting performance of the toy gun is reduced.

SUMMARY OF THE INVENTION

Whereas the foregoing description, the present inventor makes diligent studies in providing an improved structure so as to overcome the conventional problems.

It is a main object of the present invention to provide a cylinder tube of a toy gun, wherein air induction passages are formed circularly on a cylinder head for increasing the area of air suction such that much more outside air can be sucked into the air storage chamber immediately after the backward movement of the piston. As a result, the air capacity of the cylinder tube can be increased so as to produce larger air pressure for pushing the bullet away from the toy gun, thereby providing the simulated recoil effect, which simulates the real shooting, and improving the shooting performance of the toy gun.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a three-dimensional view showing the inside structure of the toy gun of the present invention.

FIG. 2 is a schematic view showing the motion of the first preferred embodiment of the present invention.

FIG. 3 is a schematic view showing another motion of the first preferred embodiment of the present invention.

FIG. 4 is a three-dimensional view showing the radial cross-section of the cylinder head of FIG. 3.

FIG. 5 is a schematic view showing the motion of the second preferred embodiment of the present invention.

FIG. 6 is a schematic view showing another motion of the second preferred embodiment of the present invention.

FIG. 7 is a three-dimensional view showing the radial cross-section of the cylinder head of FIG. 6.

FIG. 8 is a schematic view showing the motion of the third preferred embodiment of the present invention.

FIG. 9 is a schematic view showing another motion of the third preferred embodiment of the present invention.

FIG. 10 is a three-dimensional view showing one radial cross-section of the cylinder head of FIG. 9.

FIG. 11 is a three-dimensional view showing another radial cross-section of the cylinder head of FIG. 9.

FIG. 12 is a three-dimensional, partial view of FIG. 10.

FIG. 13 is a schematic view showing the motion of the fourth preferred embodiment of the present invention.

FIG. 14 is a schematic view showing another motion of the fourth preferred embodiment of the present invention.

FIG. 15 is a three-dimensional view showing the radial cross-section of the cylinder head of FIG. 14.

FIG. 16 is a schematic view showing the motion of the fifth preferred embodiment of the present invention.

FIG. 17 is a schematic view showing another motion of the fifth preferred embodiment of the present invention.

FIG. 18 is a three-dimensional view showing the radial cross-section of the cylinder head of FIG. 17.

FIG. 19 is a schematic view showing the motion of the sixth preferred embodiment of the present invention.

FIG. 20 is a schematic view showing another motion of the sixth preferred embodiment of the present invention.

FIG. 21 is a three-dimensional view showing the radial cross-section of the cylinder head of FIG. 20.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The descriptions taken with the drawings make the structures, features, and embodiments of the present invention apparent to the examiner how the present invention may be embodied in practice.

Referring to FIG. 1, a structure of toy gun is illustrated. A piston 3 is slidable in a cylinder tube 2 of a gun body 1. A spring 4 is located between the bottom of the gun body 1 and the piston 3. A high torque motor 5 is located in a gun grip. The motor 5 is connected to a final gear 63, which is partially protrudent into the cylinder tube 2, via a steering gear 61 and a reduction gear 62 of a gear set 6 for being connectedly engaged with a rack on the bottom of the piston 3 and for driving the final gear 63 to pull back the piston 3 and to lean against a slide block 71 of a pull rod 7 via a protrudent pin 632 until the motor 5 is exactly released from an arc-shaped releasing edge 631 of the final gear 63,. thereby completing the process for compressing the air so as to push a bullet to the outside of the toy gun.

Prior to describing the preferred embodiment of the present invention, please refer to FIG. 2. As shown in this diagram, an air storage chamber 21 with various capacities can be formed in the cylinder tube 2 by various movements of the piston 3 within the cylinder tube 2. Besides, a tube passage 22 is formed to penetrate through the cylinder tube 2. One end of the tube passage 22 is communicated with the air storage chamber 21, and the other end of the tube passage 22 is connected to a bullet passage and extended to the outside of the gun muzzle (not shown). When the piston 3 is in action, the air can be sucked into the air storage chamber 21 from the front end of the tube passage 22. It is specially mentioned that in order to improve the shooting performance of the toy gun for simulating the recoil effect of real shooting, much more air must be accumulated in the cylinder tube 2 so as to form larger air pressure for pushing the bullet away from the toy gun. As a result, the present invention is characterized in that at least an air induction passages 31 are formed on a cylinder head 23 of the cylinder tube 2 to communicate the air storage chamber 21 with the cylinder head 23, and that a control device 8 is applied to the air induction passages 31 for correspondingly opening or closing the air induction passages 31 according to the forward or backward movement of the piston. Therefore, in the air suction state, the air suction amount and the air capacity of the cylinder tube 2 can be increased by using the additionally formed air induction passages 31. Besides, in the shooting state, the air induction passages 31 are closed by the control device 8 so as to produce larger air pressure for pushing the bullet to the outside of the toy gun.

As shown in FIG. 2 through FIG. 4, the motions of the first preferred embodiment of the present invention are illustrated. As shown in FIG. 4, several air induction passages 31 are formed circularly around the tube passage 22 of the cylinder tube 23, and the control device 8 is further applied to the cylinder tube 23 for opening or closing the air induction passages 31. The control device 8 is a ring-shaped movable plate 81 made of a thin rubber plate, a thin steel plate, or a thin leaf spring. Besides, the movable plate 81 has an opening 811 corresponding to the tube passage 22. One end of the movable plate 81 is affixed to the inside of the cylinder head 23 by a nail 812, and the other end of the movable plate 81 is flatly, movably leant on the air induction passages 31. In the rest and shooting states, the stationary movable plate 81 is able to close the air induction passages 31, as shown in FIG. 3. In the air suction state, as shown in FIG. 2, the piston 3 is shifted backward to compress the spring 4 such that a suction force is formed immediately to provide the air storage chamber 21 with a negative pressure, whereby the movable plate 81 is lifted up in the same direction as the movement of the piston 3 to open the air induction passages 31. At the same moment, much more outside air can be sucked into the air storage chamber 21 via the air induction passages 31 and the tube passage 22. As a result, the air suction speed and air suction amount can be both increased significantly for further increasing the air capacity of the air storage chamber 21. In the shooting state, as shown in FIG. 3, the piston 3 is released from the arc-shaped releasing edge 631 of the final gear 63 (shown in FIG. 1) such that the piston 3 is shifted rapidly toward the air induction passages 31 by the resilience of the restored spring 4, which is previously compressed, whereby the air pressure is produced to force the movable plate 81 to close the air induction passages 31. As a result, the air inside the air storage chamber 21 can be exhausted via the opening 811 and air passage 22 for pushing the bullet to the outside of the toy gun by larger air pressure.

The improved means of the present invention are disclosed adequately in the description of the first preferred embodiment. Other preferred embodiments, which are derived from the first preferred embodiment according to the spirit and concept of the present invention, are disclosed in the following description. It is additionally mentioned that the motions of the piston and the capacity changes of the air storage chamber of the following preferred embodiments, which are described roughly, are identical to that of the first preferred embodiment.

Referring further to FIG. 5 through FIG. 7, the motions of the second preferred embodiment of the present invention are illustrated. As show in FIG. 5 and FIG. 6, the control devices 8 are steel ball valves 82 held in the additionally formed air induction passages 32, respectively. The air induction passages 32 are cone-shaped passages. At least a blocking pillar 321 is located on a larger opening of each of the cone-shaped air induction passages 32 for forming two or more air inlets (shown in FIG. 7). The diameter of the steel ball valve 72 is larger than the caliber of the air inlet and the smaller opening of the air induction passage 32 to ensure that the steel ball vales 82 are inseparably shiftable within the respective air induction passages 32. In the air suction state (shown in FIG. 5), the piston 3 is shifted backward such that the stationary steel ball valves 82 are also shifted backward immediately by the suction force until they are blocked by the blocking pillars 321. At the same moment, much more outside air can be sucked into the air storage chamber 21 via the smaller openings of the air induction passages 32 and the air inlets by the piston 3. In the shooting state (shown in FIG. 6), the piston 3 is shifted rapidly toward the air induction passages 32 such that the steel ball valves 82 can be shifted in the same direction as the movement of the piston 3 by the air inside the air storage chamber 21 so as to close the smaller openings of the air induction passages 32.

Referring further to FIG. 8 through FIG. 12, the motions of the third preferred embodiment of the present invention are illustrated. As show in FIG. 11, several air induction passages 33 are formed on the cylinder head 23 circularly around the tube passage 22. As shown in FIG. 10, a cup-shaped outer cover 331 is extended from and connected to one end of the cylinder head 23. The center of the outer cover 331 is communicated with one end of the tube passage 22 for forming an opening. Several through holes 332 and the air induction passages 33 are staggered. Several notches are formed on the bottom of the outer cover 331 for forming several arc-shaped air inlets, which communicate the air induction passages 33 with the air storage chamber 21, between the outer cover 331 and the cylinder head 23, as shown in FIG. 8 and FIG. 9. The control device 8 is a ring-shaped movable plate 83 having an opening 831 corresponding to the tube passage 22, and it is made of a thin rubber plate, a thin steel plate, or a thin leaf spring. The movable plate 83 is affixed to light springs 333 of the outer cover 331 and attached to the outer edge of the tube passage 22 (shown in FIG. 12). The diameter of the movable plate 83 is approximately equal to that of the outer cover 331, but it is larger than that of the air induction passages 33 for closing the air induction passages 33. In the air suction state, as shown in FIG. 8, the piston 3 is shifted backward such that the movable plate 83 is leant on the light springs 333 immediately so as to open the air induction passages 33 such that the outside air can be sucked into the air storage chamber 21 via the air inlets. In the shooting state (shown in FIG. 9), the piston 3 is shifted forward to compress the air inside the air storage chamber 21 such that the movable plate 83 is shifted by the resilience of the light springs 333 and the air that passes through the through holes 332 to close the air induction passages 33.

Referring further to FIG. 13 through FIG. 15, the motions of the fourth preferred embodiment of the present invention are illustrated. As show in FIG. 15, several air induction passages 34 and several pivotal connection holes 341 are formed on the cylinder head 23 circularly around the tube passage 22 circularly. The control device 8 is a movable valve 84 for opening or closing the air induction passages 34, and is pivotally, correspondingly inserted into the pivotal connection holes 341 by using several valve rods. A block 841 and several blocks 841′ are mounted on both ends of the movable valve 84, respectively. An opening 842 is formed on the movable valve 84 corresponding to the tube passage 22. Several air inlets 843 of the movable valve 84 and the air induction passages 34 of the cylinder head 23 are staggered. A spring 844 is sleeved onto each valve rod of the movable valve 84, and located between the blocks 841′ and one end of the pivotal connection holes 341. The blocks 841 and 841′ are for closing the air induction passages 34 and for limiting the pivotal connection according to the length of the valve rods. In the air suction state, as shown in FIG. 13, the piston 3 is shifted backward for driving the backward movement of the movable valve 84 so as to compress the springs 844 for opening the air induction passages 34 such that a lot of outside air can be sucked into the air storage chamber 21 via the air inlets 843. In the shooting state, as shown in FIG. 14, the piston 3 is shifted forward to compress the air inside the air storage chamber 21 such that the movable valve 84 is shifted forward by using the resilience of the springs 844. When the air induction passages 34 are closed by the block 841, the air inlets 843 and the air induction passages 34, which are staggered, are not communicated with each other such that the air can be exhausted to the outside via the opening 842 and the tube passage 22.

Referring further to FIG. 16 through FIG. 18, the motions of the fifth preferred embodiment of the present invention are illustrated. As show in FIG. 18, several air induction passages 35 are formed on the cylinder head 23 circularly around the tube passage 22 circularly. The tube passage 22 is also for insertion of the control device 8. The control device 8 is a ring-shaped movable plate 85 made of a thin rubber plate, a thin steel plate, or a thin leaf spring. The movable plate 85 has an opening 851 corresponding to the tube passage 22. The movable plate 85 is coupled with the tube passage 22 by using a hollow rod 852, wherein the hollow rod 852 is located to interpose through the opening 851 for closing the air induction passages 35 completely, as shown in FIG. 17. In the air suction state, as shown in FIG. 16, the piston 3 is shifted backward such that the movable plate 85, which is stationary, is lifted backward correspondingly for opening the air suction passages 35 such that a lot of outside air can be sucked into the air storage chamber 21 via the gap between the movable plate 85 and the cylinder tube 2. In the shooting state, as shown in FIG. 17, the piston 3 is shifted forward to compress the air inside the air storage chamber 21 to close the air induction passages 35 by using the movable plate 85.

Referring further to FIG. 19 through FIG. 21, the motions of the sixth preferred embodiment of the present invention are illustrated. As show in FIG. 21, several air induction passages 36 are formed on the cylinder head 23 circularly around the tube passage 22. The tube passage 22 is for insertion of the control device 8. The control device 8 is a movable valve 86 having a block 861 and a block 861′ on both ends. Several air inlets 863 of the movable valve 86 and the air induction passages 36 of the cylinder head 23 are staggered. The movable valve 86 is coupled with the tube passage 22 by using a hollow valve rod, wherein the block 861 is for closing the air induction passages 36 and for limiting the pivotal connection. The block 861′ is for limiting the pivotal connection and further for connection with a pull rod 7 so as to shift the movable valve 86.

In the air suction state, as shown in FIG. 19, the piston 3 is driven by the final gear 63 to further pull back the pull rod 7 (as shown in FIG. 1), whereby the movable valve 86 is shifted backward for opening the air induction passages 36. In the shooting state, as shown in FIG. 20, the piston 3 is shifted forward to compress the air inside the air storage chamber 21 such that the air induction passage 36 can be closed by the movable valve 86.

It is additionally mentioned that the shape, size and amount of the air induction passage of the cylinder tube can be adjusted so as to provide the optimum air pressure according to the practical requirement. However, this is not the key feature of the present invention and is not detailedly described herein.

While the preferred embodiment of the invention has been set forth for the purpose of disclosure, modifications of the disclosed embodiment of the invention as well as other embodiments thereof many occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments, which do not depart from the spirit and scope of the invention. 

1. A cylinder tube of a toy gun comprising: a cylinder tube for holding a piston, said cylinder tube having a cylinder head on a front end thereof, said cylinder being penetrated through by a tube passage, said cylinder head having at least an air induction passage around said tube passage circularly; and a control device for correspondingly opening or closing said air induction passage according to the movement of said piston, said control device being a movable plate.
 2. The cylinder tube of the toy gun of claim 1, wherein said movable plate has an opening on the center thereof corresponding to said tube passage.
 3. The cylinder tube of the toy gun of claim 1, wherein said movable plate is a thin rubber plate.
 4. The cylinder tube of the toy gun of claim 1, wherein said movable plate is a thin steel plate.
 5. The cylinder tube of the toy gun of claim 1, wherein said movable plate is a thin leaf spring.
 6. The cylinder tube of the toy gun of claim 1, wherein an outer cover is connected to one end of said cylinder head, the center of said outer cover is communicated with one end of said tube passage for forming an opening, said outer cover has a plurality of through holes, which are staggered with said air induction passage, and a plurality of air inlets formed between notches on the bottom of said outer cover and said cylinder head for communicating said air induction passage with said air storage chamber.
 7. The cylinder tube of the toy gun of claim 1, wherein an outer cover is connected to one end of said cylinder head, and said movable plate is affixed to said outer cover by a light spring.
 8. The cylinder tube of the toy gun of claim 1, wherein one end of said movable plate is affixed to the inside of said cylinder head by a nail.
 9. The cylinder tube of the toy gun of claim 1, wherein said movable plate is coupled with said tube passage via a hollow rod.
 10. A cylinder tube of a toy gun comprising: a cylinder tube for holding a piston, said cylinder tube having a cylinder head on a front end thereof, said cylinder being penetrated through by a tube passage, said cylinder head having at least an air induction passage around said tube passage circularly; and a control device for correspondingly opening or closing said air induction passage according to the movement of said piston, said control device being a movable valve.
 11. The cylinder tube of the toy gun of claim 10, wherein at least an air inlet is formed on said movable plat and staggered with said air induction passage.
 12. The cylinder tube of the toy gun of claim 10, wherein two blocks are formed on both ends of said movable valve, respectively, for closing said air induction passage and for limiting the connection of said movable valve.
 13. The cylinder tube of the toy gun of claim 10, wherein said movable valve is coupled with said tube passage via a hollow valve rod.
 14. The cylinder tube of the toy gun of claim 10, wherein two blocks are formed on both ends of said movable valve, respectively, said movable valve is pivotally coupled with said tube passage via a hollow valve rod, and one of said blocks is to shift said movable valve by connection with a pull rod.
 15. The cylinder tube of the toy gun of claim 10, wherein a plurality of pivotal connection holes are formed circularly on said cylinder head for pivotal connection with a plurality of valve rods of said movable valve.
 16. The cylinder tube of the toy gun of claim 10, wherein a plurality of pivotal connection holes are formed circularly on said cylinder head for pivotal connection with a plurality of valve rods of said movable valve, said movable valve has an opening corresponding to said tube passage, and a spring is sleeved onto each of said valve rods.
 17. A cylinder tube of a toy gun comprising: a cylinder tube for holding a piston, said cylinder tube having a cylinder head on a front end thereof, said cylinder being penetrated through by a tube passage, said cylinder head having at least an air induction passage around said tube passage circularly; and a control device for correspondingly opening or closing said air induction passage according to the movement of said piston, said control device being a steel ball valve.
 18. The cylinder tube of the toy gun of claim 17, wherein said air induction passage of said cylinder tube is a cone-shaped passage, and at least a blocking pillar is located on a larger opening of said air induction passage for forming at least two air inlets.
 19. The cylinder tube of the toy gun of claim 17, wherein said air induction passage of said cylinder tube is a cone-shaped passage, at least a blocking pillar is located on a larger opening of said air induction passage for forming at least two air inlets, and the diameter of said steel ball valve is larger than the calibers of said air inlets and a smaller opening of said air induction passage. 